UPDATED | https://www.thingiverse.com/thing:1922173

Sometimes an electric drill is simply too powerful for delicate parts.

The answer is a handle for your drill bits!

Requires:

2 x M4 Square Nuts.
2 x M4 8mm Grub Screws.

STLs attached for 3mm & 4mm Bits.

STEP attached so you can modify to your exact needs.

Modelled in 123D Design.

Printed with a BigBox | http://bigbox-3d.com/